@article{MZ_1956__66_169621,
     author = {Johann Schr\"oder},
     title = {Das {Iterationsverfahren} bei allgemeinerem {Abstandsbegriff.}},
     journal = {Mathematische Zeitschrift},
     pages = {111--116},
     publisher = {mathdoc},
     volume = {66},
     year = {1956},
     zbl = {0073.33503},
     url = {http://geodesic.mathdoc.fr/item/MZ_1956__66_169621/}
}